Contact Issue

Chethan Y C

Hi,

I am working on a bellows model (Hyperelastic material) and i am facing contact issues, i tried with self contact both N2S and S2S CONSLI with friction value trials of 0.1 and 0.2 and i am not able to solve the issue. Can you suggest any other iterations i could try with? (Solver:Optistruct ,  version 2017.2.2) Sectional view of the model is shown below

Regards,

Chethan

Rahul Rajan_21763

Do you have first order element or second order element? Generally to avoid element distortion we recommends to use first order element. Can you also share .out file of the run?

Chethan Y C

Hi,

 

I am using first order elements.  I can't share the complete out file, since i am using uniaxial and planar test data for hyperelastic material and these values will be in out file to calculate the constants. But if you want to see any particular information in out file  i can cut paste.

 

Regards,

Chethan

Rahul Rajan_21763

Which MATHE material model you are using ?I believe you would be running this with PARAM (LGDISP 1 and HASHASSM YES)cards. If possible you can share the screenshot of first four entries of TABLES1 card for uniaxial and planar test data.You can use my dropbox available on my signature.

Chethan Y C

Hi,

• I am using Mooney Rivlin(MOOR) model, Yes i am using LGDISP=1 and HASHASSM=YES. I don't think i can share the material data.
• Is there any option to control the hourglass effect for PLSOLID card image??
• How to control element distorsion?

 

Regards,

Chethan

Rahul Rajan_21763

It is difficult to comment unless we get clear information about the material property defined.

Do you see any warning in the out file? If yes ,could you please share the detail of same.

Does the NA field is activated in MATHE Mooney card?

Chethan Y C

Hi,

• NO warning message in the out file
• NA field has default value, should that be changed?

Regards,

Chethan